Vehicle-mounted refrigerator door control system

Abstract

The utility model discloses a door control system of a vehicle-mounted refrigerator, which adopts the technical scheme that a roller type magnetic braiding Hall sensor is connected with a refrigerator door, and a door motor pushes and pulls the refrigerator door by utilizing a matching structure of a first steel wire rope, a second steel wire rope, a gear and an auxiliary wheel. According to the scheme, the first steel wire rope and the second steel wire rope are connected to the first spring and the second spring respectively, and in practical application, when the box door triggers the anti-pinch function and the box door is in a half-open or full-open state, a user performs small-amplitude push-and-pull action on the box door according to previous habits; at the moment, due to the arrangement of the first spring and the second spring, the box door can move slightly, and the microprocessor module controls the door motor to perform push-pull control on the box door according to a preset program after detecting the movement of the box door through the Hall sensor connected with the box door.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle-mounted refrigerators, and more specifically to a vehicle-mounted refrigerator door control system. Background Art

[0002] A car refrigerator is a device used to refrigerate items and is installed in vehicles. Existing car refrigerator door controls primarily utilize a manual push-pull mechanism, which can be inconvenient for users. To improve user convenience, relevant technicians have equipped car refrigerator doors with a one-touch door opening and closing function and an anti-pinch feature. The one-touch door opening and closing function uses buttons on the car refrigerator's peripherals to open and close the door. The one-touch door opening and closing function utilizes an MCU controller to control the forward and reverse rotation of the door motor. The anti-pinch feature utilizes an MCU controller to detect the Hall effect signals output by the door motor and, based on these signals, control the motor's reverse motion at the appropriate time. As can be seen, the door of existing car refrigerators remains partially open when the anti-pinch feature is triggered. A common solution is to press the door switch again to fully open or close the door. However, due to the door motor's inherent locking function, this prevents the door motor from rotating, preventing the desired push-pull follow-up function from being achieved. Utility Model Content

[0003] In order to solve the above technical problems, the purpose of the present invention is to provide a vehicle refrigerator door control system.

[0004] The technical solution adopted by the utility model to solve the problem is:

[0005] A vehicle refrigerator door control system, comprising:

[0006] Door motor;

[0007] A box door, one side of which is provided with a push area;

[0008] training wheels;

[0009] a first spring, the first spring being fixedly disposed in a pushing area of ​​the door;

[0010] a second spring, the second spring being fixedly disposed in the pushing area of ​​the door;

[0011] Microcontroller module;

[0012] Motor drive module;

[0013] Power module;

[0014] A first Hall signal processing module;

[0015] A second Hall signal processing module;

[0016] A Hall sensor, wherein the Hall sensor is a roller-type magnetically coded Hall sensor and is connected to the box door;

[0017] A slide rail, on which the door is arranged;

[0018] A gear, the gear being mounted on the door motor and being in driving connection with the door motor;

[0019] a first steel wire rope, one end of which is wound around the gear, and the other end of which is fixedly connected to the first spring;

[0020] a second steel wire rope, one end of the second steel wire rope being wound around the gear, and the other end of the second steel wire rope being wound around the auxiliary wheel and fixedly connected to the second spring;

[0021] The first steel wire rope and the second steel wire rope are both connected to the box door, and the Hall sensor is connected to the box door;

[0022] The motor drive module and the first Hall signal processing module are respectively connected to the door motor, the second Hall signal processing module is connected to the Hall sensor, the power supply module is respectively connected to the microcontroller module, the motor drive module, the first Hall signal processing module, the second Hall signal processing module and the Hall sensor, and the microcontroller module is respectively connected to the motor drive module, the first Hall signal processing module and the second Hall signal processing module.

[0023] As a further improvement of the above technical solution, the power supply module includes a voltage regulator chip model NCV8664, a diode D1, a capacitor C1, a capacitor C2, a power port and a power supply port. The voltage regulator chip is configured with an input end, an output end and a ground end. The power port is connected to the positive electrode of the diode D1, the negative electrode of the diode D1 is connected to the input end of the voltage regulator chip, the output end of the voltage regulator chip is connected to the power supply port, the ground end of the voltage regulator chip is connected to the ground end, one end of the capacitor C1 is connected to the input end of the voltage regulator chip, the other end of the capacitor C1 is connected to the ground end, one end of the capacitor C2 is connected to the output end of the voltage regulator chip, and the other end of the capacitor C2 is connected to the ground end.

[0024] As a further improvement of the above technical solution, the motor drive module includes a driver chip model DIA57100, a resistor R1, a resistor R2, a capacitor C3, a capacitor C4, a capacitor C5, a transient suppression diode D2 and a motor port. The driver chip is configured with a first clock input terminal, a second clock input terminal, a pulse width modulation terminal, an addressing terminal, an analog output terminal, a first motor connection terminal and a second motor connection terminal. The first clock input terminal, the second clock input terminal, the pulse width modulation terminal and the addressing terminal of the driver chip are respectively connected to the microcontroller module, and the analog output terminal of the driver chip is connected to the first motor connection terminal through the resistor R1. The microcontroller module is connected, one end of the resistor R2 is connected to the analog output terminal of the driver chip, the other end of the resistor R2 is connected to the ground terminal, one end of the capacitor C3 is connected to the connection point between the resistor R1 and the microcontroller module, the first motor connection terminal of the driver chip is connected to the second motor connection terminal of the driver chip through the capacitor C4 and the capacitor C5, the two ends of the transient suppression diode D2 are connected one-to-one with the first motor connection terminal and the second motor connection terminal of the driver chip, and the first motor connection terminal and the second motor connection terminal of the driver chip are connected to the motor port.

[0025] As a further improvement of the above technical solution, the first Hall signal processing module includes a first sensor end, a second sensor end, a first transmission end, a second transmission end, a voltage regulator D3, a voltage regulator D4, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7 and a resistor R8. The first sensor end and the second sensor end are both connected to the motor port, the first transmission end and the second transmission end are both connected to the microcontroller module, the first sensor end is connected to the first transmission end through the resistor R7, and the second sensor end is connected to the second transmission end through the resistor R8. One end of the capacitor C6 is connected to the first sensor end, and the other end of the capacitor C6 is connected to the ground end. One end of the capacitor C7 is connected to the second sensor end, and the other end of the capacitor C7 is connected to the ground end. The negative electrode of the voltage regulator D3 is connected to the The first transmission end is connected to the first sensor end, the positive electrode of the voltage-stabilizing diode D3 is connected to the power supply end, the negative electrode of the voltage-stabilizing diode D4 is connected to the second transmission end, the positive electrode of the voltage-stabilizing diode D4 is connected to the power supply end, one end of the capacitor C8 is connected to the first transmission end, the other end of the capacitor C8 is connected to the ground end, one end of the capacitor C9 is connected to the second transmission end, the other end of the capacitor C9 is connected to the ground end, one end of the resistor R3 is connected to the first sensor end, one end of the resistor R4 is connected to the second sensor end, the other end of the resistor R3 and the other end of the resistor R4 are connected together and connected to one end of the resistor R6, the other end of the resistor R6 is respectively connected to the power supply end and one end of the capacitor C11, the other end of the capacitor C11 is connected to the ground end, one end of the resistor R5 is connected to the connecting point of the resistor R3 and the resistor R4, the other end of the resistor R5 is connected to the ground end, and the capacitor C10 is connected in parallel with the resistor R5.

[0026] As a further improvement of the above technical solution, the Hall sensor is configured with a data end and a power supply end, and the second Hall signal processing module includes a resistor R9, a resistor R10, a capacitor C12, a capacitor C13 and a capacitor C14, one end of the resistor R9 is connected to the power supply module, and the other end of the resistor R9 is connected to the ground end through the capacitor C12, one end of the resistor R10 is connected to the ground end through the capacitor C13, and is also connected to the microcontroller module, the other end of the resistor R10 is connected to the ground end through the capacitor C14, and is also connected to the data end of the Hall sensor, and the power supply end of the Hall sensor is connected to the connection point between the resistor R9 and the capacitor C12.

[0027] The beneficial effects of the present invention are: in this technical solution, a roller-type magnetically coded Hall sensor is connected to the box door, and the first steel wire rope, the second steel wire rope, the gear and the auxiliary wheel are used to cooperate to realize the push-pull operation of the door motor on the box door. In this solution, the first steel wire rope and the second steel wire rope are respectively connected to the first spring and the second spring. In actual application, when the box door triggers the anti-pinch function and the box door is in a half-open or fully open state, the user pushes and pulls the box door in a small range according to past habits. At this time, due to the setting of the first spring and the second spring, the box door can move in a small range. After the microcontroller module detects the movement of the box door through the Hall sensor connected to the box door, it controls the door motor to push and pull the box door according to the preset program. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further explained below with reference to the accompanying drawings and specific implementation methods.

[0029] Figure 1 It is a structural diagram of the utility model;

[0030] Figure 2 This is a circuit framework diagram of the utility model;

[0031] Figure 3 This is a circuit diagram of the power module in the utility model;

[0032] Figure 4 This is a circuit diagram of the motor drive module in the utility model;

[0033] Figure 5 This is a circuit diagram of the first Hall signal processing module in the present utility model;

[0034] Figure 6 This is a circuit diagram of the second Hall signal processing module in the present utility model;

[0035] Figure 7 It is a circuit diagram of the microcontroller module in the utility model. DETAILED DESCRIPTION

[0036] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0038] In the description of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0039] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0040] Reference Figures 1 to 7 The present application discloses a vehicle refrigerator door control system, a first embodiment of which includes:

[0041] Door motor 100;

[0042] The door 200 has a push area 210 on one side;

[0043] Auxiliary wheels 300, the auxiliary wheels 300 and the pushing area 210 of the door 200 are respectively arranged on both sides of the door 200;

[0044] A first spring 410, wherein the first spring 410 is fixedly disposed in the pushing area 210 of the door 200;

[0045] A second spring 420 , the second spring 420 is fixedly disposed in the pushing area 210 of the door 200 ;

[0046] Microcontroller module;

[0047] Motor drive module;

[0048] Power module;

[0049] A first Hall signal processing module;

[0050] A second Hall signal processing module;

[0051] A Hall sensor 500, which is a roller-type magnetically coded Hall sensor and is connected to the door 200;

[0052] A slide rail 600, on which the door 200 is disposed;

[0053] A gear 700 , wherein the gear 700 is mounted on the door motor 100 and is in transmission connection with the door motor 100 ;

[0054] a first steel wire rope 810 , one end of which is wound around the gear 700 , and the other end of which is fixedly connected to the first spring 410 ;

[0055] a second steel wire rope 820 , one end of which is wound around the gear 700 , and the other end of which is wound around the auxiliary wheel 300 and fixedly connected to the second spring 420 ;

[0056] The motor drive module and the first Hall signal processing module are respectively connected to the door motor 100, the second Hall signal processing module is connected to the Hall sensor 500, the power supply module is respectively connected to the microcontroller module, the motor drive module, the first Hall signal processing module, the second Hall signal processing module and the Hall sensor 500, and the microcontroller module is respectively connected to the motor drive module, the first Hall signal processing module and the second Hall signal processing module.

[0057] In this embodiment, the first spring 410 and the second spring 420 are used as preload springs. In this embodiment, a drawer-type door opening method is used to open and close the door of the vehicle refrigerator.

[0058] In this embodiment, the Hall sensor 500 and the door motor 100 both generate Hall signals. In order to improve the accuracy of receiving the Hall signals, this embodiment respectively sets the first Hall signal processing module and the second Hall signal processing module to process the Hall signals of the door motor 100 and the Hall signals of the Hall sensor 500 respectively.

[0059] Specifically, in this embodiment, a roller-type magnetically coded Hall sensor is connected to the box door 200, and the matching structure of the first steel wire rope 810, the second steel wire rope 820, the gear 700 and the auxiliary wheel 300 is used to realize the push-pull operation of the door motor 100 on the box door 200. In this embodiment, the first steel wire rope 810 and the second steel wire rope 820 are respectively connected to the first spring 410 and the second spring 420. In actual application, when the box door 200 triggers the anti-pinch function and the box door 200 is in a half-open or fully open state, the user pushes and pulls the box door 200 in a small range according to past habits. At this time, due to the setting of the first spring 410 and the second spring 420, the box door 200 can move in a small range. After the microcontroller module detects the movement of the box door 200 through the Hall sensor 500 connected to the box door 200, it controls the door motor 100 to push and pull the box door 200 according to the preset program.

[0060] Further as a preferred embodiment, in this embodiment, the power supply module includes a voltage regulator chip model NCV8664, a diode D1, a capacitor C1, a capacitor C2, a power connection port and a power supply port. The voltage regulator chip is configured with an input end, an output end and a ground end. The power connection port is connected to the positive electrode of the diode D1, the negative electrode of the diode D1 is connected to the input end of the voltage regulator chip, the output end of the voltage regulator chip is connected to the power supply port, the ground end of the voltage regulator chip is connected to the ground end, one end of the capacitor C1 is connected to the input end of the voltage regulator chip, the other end of the capacitor C1 is connected to the ground end, one end of the capacitor C2 is connected to the output end of the voltage regulator chip, and the other end of the capacitor C2 is connected to the ground end.

[0061] As a further preferred embodiment, in this embodiment, the motor drive module includes a driver chip model DIA57100, a resistor R1, a resistor R2, a capacitor C3, a capacitor C4, a capacitor C5, a transient suppression diode D2 and a motor port. The driver chip is configured with a first clock input terminal, a second clock input terminal, a pulse width modulation terminal, an addressing terminal, an analog output terminal, a first motor connection terminal and a second motor connection terminal. The first clock input terminal, the second clock input terminal, the pulse width modulation terminal and the addressing terminal of the driver chip are respectively connected to the microcontroller module, and the analog output terminal of the driver chip is connected to the microcontroller module through the resistor R1. connected to the microcontroller module, one end of the resistor R2 is connected to the analog output end of the driver chip, the other end of the resistor R2 is connected to the ground end, one end of the capacitor C3 is connected to the connection point between the resistor R1 and the microcontroller module, the first motor connection end of the driver chip is connected to the second motor connection end of the driver chip through the capacitor C4 and the capacitor C5, the two ends of the transient suppression diode D2 are connected to the first motor connection end and the second motor connection end of the driver chip in a one-to-one correspondence, and the first motor connection end and the second motor connection end of the driver chip are connected to the motor port.

[0062] As a further preferred embodiment, in this embodiment, the first Hall signal processing module includes a first sensor end, a second sensor end, a first transmission end, a second transmission end, a voltage regulator D3, a voltage regulator D4, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7 and a resistor R8. The first sensor end and the second sensor end are both connected to the motor port, the first transmission end and the second transmission end are both connected to the microcontroller module, the first sensor end is connected to the first transmission end through the resistor R7, and the second sensor end is connected to the second transmission end through the resistor R8. One end of the capacitor C6 is connected to the first sensor end, and the other end of the capacitor C6 is connected to the ground end. One end of the capacitor C7 is connected to the second sensor end, and the other end of the capacitor C7 is connected to the ground end. The negative electrode of the voltage regulator D3 The first transmission terminal is connected to the first transmission terminal, the positive electrode of the voltage-stabilizing diode D3 is connected to the power supply terminal, the negative electrode of the voltage-stabilizing diode D4 is connected to the second transmission terminal, the positive electrode of the voltage-stabilizing diode D4 is connected to the power supply terminal, one end of the capacitor C8 is connected to the first transmission terminal, the other end of the capacitor C8 is connected to the ground terminal, one end of the capacitor C9 is connected to the second transmission terminal, the other end of the capacitor C9 is connected to the ground terminal, one end of the resistor R3 is connected to the first sensor terminal, one end of the resistor R4 is connected to the second sensor terminal, the other end of the resistor R3 and the other end of the resistor R4 are connected together and connected to one end of the resistor R6, the other end of the resistor R6 is respectively connected to the power supply terminal and one end of the capacitor C11, the other end of the capacitor C11 is connected to the ground terminal, one end of the resistor R5 is connected to the connecting point of the resistor R3 and the resistor R4, the other end of the resistor R5 is connected to the ground terminal, and the capacitor C10 is connected in parallel with the resistor R5.

[0063] Further as a preferred embodiment, in this embodiment, the Hall sensor 500 is configured with a data end and a power supply end, and the second Hall signal processing module includes a resistor R9, a resistor R10, a capacitor C12, a capacitor C13 and a capacitor C14, one end of the resistor R9 is connected to the power module, and the other end of the resistor R9 is connected to the ground end through the capacitor C12, one end of the resistor R10 is connected to the ground end through the capacitor C13, and is also connected to the microcontroller module, the other end of the resistor R10 is connected to the ground end through the capacitor C14, and is also connected to the data end of the Hall sensor 500, and the power supply end of the Hall sensor 500 is connected to the connection point between the resistor R9 and the capacitor C12.

[0064] The above are only preferred embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A car refrigerator door control system, characterized in that: include: Door motor (100); A box door (200), wherein one side of the box door (200) is provided with a push area (210); Training wheels (300); a first spring (410), the first spring (410) being fixedly disposed in a pushing region (210) of the door (200); a second spring (420), the second spring (420) being fixedly disposed in the pushing region (210) of the door (200); Microcontroller module; Motor drive module; Power module; A first Hall signal processing module; A second Hall signal processing module; A Hall sensor (500), wherein the Hall sensor (500) is a roller-type magnetically coded Hall sensor, and the Hall sensor (500) is connected to the box door (200); A slide rail (600), wherein the box door (200) is arranged on the slide rail (600); A gear (700), the gear (700) being mounted on the door motor (100), the gear (700) being in transmission connection with the door motor (100); a first steel wire rope (810), one end of the first steel wire rope (810) being wound around the gear (700), and the other end of the first steel wire rope (810) being fixedly connected to the first spring (410); a second steel wire rope (820), one end of the second steel wire rope (820) being wound around the gear (700), and the other end of the second steel wire rope (820) being wound around the auxiliary wheel (300) and fixedly connected to the second spring (420); The motor drive module and the first Hall signal processing module are respectively connected to the door motor (100), the second Hall signal processing module is connected to the Hall sensor (500), the power supply module is respectively connected to the microcontroller module, the motor drive module, the first Hall signal processing module, the second Hall signal processing module and the Hall sensor (500), and the microcontroller module is respectively connected to the motor drive module, the first Hall signal processing module and the second Hall signal processing module.

2. The vehicle refrigerator door control system according to claim 1, characterized in that: The power supply module includes a voltage regulator chip model NCV8664, a diode D1, a capacitor C1, a capacitor C2, a power connection port and a power supply port. The voltage regulator chip is configured with an input end, an output end and a ground end. The power connection port is connected to the positive pole of the diode D1, the negative pole of the diode D1 is connected to the input end of the voltage regulator chip, the output end of the voltage regulator chip is connected to the power supply port, the ground end of the voltage regulator chip is connected to the ground end, one end of the capacitor C1 is connected to the input end of the voltage regulator chip, the other end of the capacitor C1 is connected to the ground end, one end of the capacitor C2 is connected to the output end of the voltage regulator chip, and the other end of the capacitor C2 is connected to the ground end.

3. The vehicle refrigerator door control system according to claim 1, characterized in that: The motor drive module includes a driver chip model DIA57100, a resistor R1, a resistor R2, a capacitor C3, a capacitor C4, a capacitor C5, a transient suppression diode D2 and a motor port. The driver chip is configured with a first clock input terminal, a second clock input terminal, a pulse width modulation terminal, an addressing terminal, an analog output terminal, a first motor connection terminal and a second motor connection terminal. The first clock input terminal, the second clock input terminal, the pulse width modulation terminal and the addressing terminal of the driver chip are respectively connected to the microcontroller module. The analog output terminal of the driver chip is connected to the microcontroller module through the resistor R1. One end of the resistor R2 is connected to the analog output terminal of the driver chip, the other end of the resistor R2 is connected to the ground terminal, one end of the capacitor C3 is connected to the connection point between the resistor R1 and the microcontroller module, the first motor connection terminal of the driver chip is connected to the second motor connection terminal of the driver chip through the capacitor C4 and the capacitor C5, the two ends of the transient suppression diode D2 are connected to the first motor connection terminal and the second motor connection terminal of the driver chip in a one-to-one correspondence, and the first motor connection terminal and the second motor connection terminal of the driver chip are connected to the motor port.

4. The vehicle refrigerator door control system according to claim 3, characterized in that: The first Hall signal processing module includes a first sensor end, a second sensor end, a first transmission end, a second transmission end, a voltage regulator D3, a voltage regulator D4, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7 and a resistor R8. The first sensor end and the second sensor end are both connected to the motor port, the first transmission end and the second transmission end are both connected to the microcontroller module, the first sensor end is connected to the first transmission end through the resistor R7, and the second sensor end is connected to the second transmission end through the resistor R8. One end of the capacitor C6 is connected to the first sensor end, and the other end of the capacitor C6 is connected to the ground end. One end of the capacitor C7 is connected to the second sensor end, and the other end of the capacitor C7 is connected to the ground end. The negative electrode of the voltage regulator D3 is connected to the first transmission end. The positive electrode of the voltage-stabilizing diode D3 is connected to the power supply terminal, the negative electrode of the voltage-stabilizing diode D4 is connected to the second transmission terminal, the positive electrode of the voltage-stabilizing diode D4 is connected to the power supply terminal, one end of the capacitor C8 is connected to the first transmission terminal, the other end of the capacitor C8 is connected to the ground terminal, one end of the capacitor C9 is connected to the second transmission terminal, the other end of the capacitor C9 is connected to the ground terminal, one end of the resistor R3 is connected to the first sensor terminal, one end of the resistor R4 is connected to the second sensor terminal, the other end of the resistor R3 and the other end of the resistor R4 are connected together and connected to one end of the resistor R6, the other end of the resistor R6 is respectively connected to the power supply terminal and one end of the capacitor C11, the other end of the capacitor C11 is connected to the ground terminal, one end of the resistor R5 is connected to the connecting point of the resistor R3 and the resistor R4, the other end of the resistor R5 is connected to the ground terminal, and the capacitor C10 is connected in parallel with the resistor R5.

5. The vehicle refrigerator door control system according to claim 1, characterized in that: The Hall sensor (500) is configured with a data terminal and a power supply terminal. The second Hall signal processing module includes a resistor R9, a resistor R10, a capacitor C12, a capacitor C13, and a capacitor C14. One end of the resistor R9 is connected to the power supply module, and the other end of the resistor R9 is connected to the ground terminal through the capacitor C12. One end of the resistor R10 is connected to the ground terminal through the capacitor C13 and is also connected to the microcontroller module. The other end of the resistor R10 is connected to the ground terminal through the capacitor C14 and is also connected to the data terminal of the Hall sensor (500). The power supply terminal of the Hall sensor (500) is connected to the connection point between the resistor R9 and the capacitor C12.

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